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Commit 6e7faf82 authored by Santosh Mardi's avatar Santosh Mardi
Browse files

devfreq: add use_ab tunnable 



In some usecases AB votes may not be needed but governor
cannot suppress the AB measured on HW.

Provide use_ab tunable for userspace to drop AB vote.

Change-Id: Ib7734e06fa00f86eb536b63526c16212012b614d
Signed-off-by: default avatarSantosh Mardi <gsantosh@codeaurora.org>
parent 2b7e2162

drivers/devfreq/governor_bw_hwmon.c

+7 −1
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ struct hwmon_node { 
	unsigned int hyst_trigger_count;

	unsigned int hyst_length;

	unsigned int idle_mbps;

	unsigned int use_ab;

	unsigned int mbps_zones[NUM_MBPS_ZONES];



	unsigned long prev_ab;
@@ -462,8 +463,10 @@ static unsigned long get_bw_and_set_irq(struct hwmon_node *node, 
	}



	node->prev_ab = new_bw;

	if (ab)

	if (ab && node->use_ab)

		*ab = roundup(new_bw, node->bw_step);

	else if (ab)

		*ab = 0;



	*freq = (new_bw * 100) / io_percent;

	trace_bw_hwmon_update(dev_name(node->hw->df->dev.parent),
@@ -803,6 +806,7 @@ gov_attr(hist_memory, 0U, 90U); 
gov_attr(hyst_trigger_count, 0U, 90U);

gov_attr(hyst_length, 0U, 90U);

gov_attr(idle_mbps, 0U, 2000U);

gov_attr(use_ab, 0U, 1U);

gov_list_attr(mbps_zones, NUM_MBPS_ZONES, 0U, UINT_MAX);



static struct attribute *dev_attr[] = {
@@ -819,6 +823,7 @@ static struct attribute *dev_attr[] = { 
	&dev_attr_hyst_trigger_count.attr,

	&dev_attr_hyst_length.attr,

	&dev_attr_idle_mbps.attr,

	&dev_attr_use_ab.attr,

	&dev_attr_mbps_zones.attr,

	&dev_attr_throttle_adj.attr,

	NULL,
@@ -967,6 +972,7 @@ int register_bw_hwmon(struct device *dev, struct bw_hwmon *hwmon) 
	node->hyst_trigger_count = 3;

	node->hyst_length = 0;

	node->idle_mbps = 400;

	node->use_ab = 1;

	node->mbps_zones[0] = 0;

	node->hw = hwmon;